The MFA options are:
1) EU Login Mobile app
only available in Google / Apple stores 🙄
Not an option. I use a de-Googled Android phone without Google's Play Store. A principled stance I'm sure more opensource people have.
2) Token / Token CRAM
Only available for EC staff & DG CLIMA users. Not an option
3) eID
I can use DIgID (NL eID). I do not feel comfortable using this to contribute to opensource.
This leaves: security key, (TPM) or Passkey
Let's try